Surely you put some efford in that one. Nice.
It seems a bit chaotic, or more like unpredictable, and that's not bad. It can make your SCP more interesting. But on the other hand It seems that you do not have exact idea for it's effect. Yeah, people trying to lay inside, then die horribly. But, something more specified would make it better. (Remember, it's just my opinion. More experienced staff might say otherwise.)
I like you trick with more and more terrible logs, and then… [DATA EXPUNGED] - remindes me 087. Nice. :)
A bit short procedures. Seriously, I know it doesn't take much to contain a coffin, but 3 lines of text? 895 is also a coffin, yet it has more to say, while still being short and brief.

It's nice. Really. Just need some more work, maybe more precised idea of what it does?
However, here are obvious problems I see:

*"All personnel of the SCP Facilities"- how and why personel from other facilities may come here?
*"entity" is term used mostly by GOC, Fundation usually says "Subject"
*"sun/moon visable on sea level" what do you mean?
*Already given number. - Don't, just stick to XXXX
*"similar to SCP-███"- remember, Your SCP should stand itself.
*"reported that the male voice said something in an unknown language" - not too much scientific, if You'd ask me…

That's basicly it. Good luck with writing, and remember not to give up. ;)

Kacpo, if you're not an experienced author yourself, please refrain from commenting first in draft threads. This is covered in the rules for this specific forum.

In this case, you're giving out incorrect advice. I'm on my phone right now, so I can't cover your entire post, but your comment on the use of the word "entity" for is patently wrong. The Foundation does not refer to SCPs as "subject", they refer to them as "SCP-XXXX".

It was found in █████, Egypt, on █/██/200█, when archaeologists were heading to the Pyramids of Giza to determine the location of one of Tutankhamun's advisors.

We should probably be told this after the anomalous parts, though this really doesn't add much.

During the night, specifically when the moon is above the horizon,

This doesn't really make much sense. "Night" and "The moon being over the horizon" aren't synonymous; it's possible for the moon to be over the horizon at day.

SCP-XXXX "awakens" and becomes hostile.

Wait, so does the actual sarcophagus get up and move around? Even though it has no articulation? If it's some kind of monster inside, then this monster is never mentioned, and SCP-XXXX is clearly called just the sarcophagus.

One test subject [REDACTED].

Bad expungement.

Possible causes of death include [DATA EXPUNGED] of the █████ and ███████, or [DATA EXPUNGED], all of which leave behind only the ████████ of the subject.

Really bad expungement.

Like, the 12 year-old Egyptian pharaoh guy

Strange how he can remember his age but not his name.

█████ in Egypt, and visited the Giza Pyramids.

Why even censor this? It's a place in Egypt that has the pyramids of Giza in them, anyone can find it out, and even if they do it's common knowledge. I'm guessing this is supposed to be Cairo, seeing as it fits the five letters and is less than 30KM from the pyramids, in which case why censor it?

[DATA EXPUNGED]

Why even have this interview if nothing's going to be shown?

presumably

They didn't have cameras in the room or anything?

Oh! It's Tutankhamun's sarcophagus! May I please see what is inside? I have always wanted to see his skeleton! He fascinates me so much!

No-one speaks like this.

Dr. ████ ████████ has requested for SCP-XXXX to be destroyed as soon as possible,

…Why? Just lock it up and post a few guards there and it won't harm anyone.

To begin with the basic idea is a thing that compels you to use it and the kills you. This is not a particularly interesting narrative (why do I care about this thing? What reaction do you expect the reader to have?). I recommend reading: http://www.scp-wiki.net/mackenzie-pitfalls

This is almost certainly a safe object, you lock it in a box and nothing happens.

Why do the dimensions of the room it is in matter?

Level 4 is a very high security clearance. This could probably be handled without needed to contract the site director or some equivalently senior person on a regular basis.

SCP-XXXX appears to resemble

Either appears to be or resembles not both. As it stands it is redundant phrasing.

SCP-XXXX appears to be inactive during the day, specifically when the sun is above the horizon. During the night, specifically when the moon is above the horizon, SCP-XXXX

This is somewhat ambiguous. The moon can be above the horizon in day time. Does it only activate when the sun is below the horizon and the moon is above it?

SCP-XXXX "awakens" and becomes hostile. SCP-XXXX is referred to as SCP-XXXX-1 in its hostile stage

It is odd to describe it as awakening or hostile given that is appears to be a inanimate object with no mind of its own…

"Any organic subject(s)" != Humans
Right now this phrasing could be reasonably interpreted to include insects etc…
It is also just an awkward turn of phrase, if you are trying to say that it effects humans just say that.

Your first picture is oddly large compared to other skips, and your second is an artists impression which shouldn't be used without good reason to. (It breaks tone and suspension of disbelief otherwise).